Portable electronic thickness measuring instrument



FIG. 1 is a front elevational view of a portable electronic thickness measuring instrument showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a bottom plan view; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a portable electronic thickness measuring instrument, as shown and described. 